S97011790 Wall Fan Grille：97011790 grille made of ABS material, the parts are manufactured in strict accordance with the upgraded OEM specifications, and verified before leaving the factory. The performance is more stable, and it is not easy to adhere to wool, which is very wear-resistant, not easy to damage, long in service life and high in reliability. Compared with the original parts, it will turn yellow and bend over time. Simple and quick installation :Ours Upgraded S97011790 Grille by 3 times, it is the most perfect accessory in the long run! 1. Before installation, turn off the power. 2. Unscrew the nut counterclockwise and remove the old grille. 3. Gently press the new grille and screw the nut clockwise to fix it to the fan body. 4. Reconnect the power supply. Compatibility information：97011790 grille replace s97011790 grille wall fan kit compatible Compatible With Nutone Broan 503,505, 507 509s Ventilation Fan 509S-A Through Wall Fan - 180 Cfm / 6.5 Sones 509S-B Through Wall Fan - 180 Cfm / 6.5 Sones etc. Why replace it:97011790 Wall Fan Grille 11-1/2 inch x 11-1/2 inch, modern design enhances the airflow of the fan grille to make the air fresher, which can effectively prevent the adhesion of wool, reduce the workload of the fan and increase the service life. Solve the problem within 2-year : If you encounter any problems, we will promptly respond to and solve your problems within 24 hours. In case of quality failure caused by design, material, manufacturing and assembly production defects, our company will be responsible for replacement or maintenance. and will deliver 97011790 Grille to your hands at the first time.What makes you stay is never accidental, but our precise service Welcome, distinguished customer! We always uphold the service concept of honesty, professionalism and efficiency to provide you with the best quality products and services Please check the model before choosing: 97011790 grille wall fan replacement S97011790 Grille Technical specifications：11-1/2 inch x 11-1/2 inch Compatible with Nutone Broan 503,505, 507 509s Ventilation Fan 509S-A Through Wall Fan - 180 Cfm / 6.5 Sones 509S-B Through Wall Fan - 180 Cfm / 6.5 Sones etc